Two bug-report clusters about missing thumbnails:
1. watchporn scenes had no thumbnail on the list, only appearing after opening
SceneDetail (which auto-enriches og:image). Coverage was 1.3% (463/36,915).
The browse scraper never captured a thumbnail. KVS stores the poster at a fixed
derivable path (contents/videos_screenshots/<id//1000*1000>/<id>/preview.jpg,
verified 8/8 loading). Scraper now sets thumbnail_url (og:image, else derived);
backfilled 36,687 existing rows -> 100% coverage.
2. SceneDetail showed no thumb where the list showed one: the mobile detail picks
the first source with a thumbnail_url (origin ASC often puts sxyprncom first),
and sxyprn/trafficdeposit stored thumbs rot to 404. The list already swaps those
for a live resolver (/proxy/sxyprn-thumb/), but the detail builder did not. It
now applies the same live-resolver swap and nulls other rotting thumbs so the
detail lands on a working image.
Both backend-only, no OTA needed.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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